Rent Shop Volunteer Join

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Friday - November 23, 2012

From: San Antonio, TX
Region: Southwest
Topic: Plant Identification, Vines
Title: Identity of milkweed vine with smooth seedpod
Answered by: Nan Hampton

QUESTION:

I believe the vine I am curious about may be Matelea reticulata. However, most of the pictures I have seen of that vine show bumps on the exterior of the seed pod, and the pod I have is green and smooth. I have never seen the vine in bloom. I would attach a picture, but I can't seem to find that option on this page. Thanks.

ANSWER:

There are several milkweed vines (Family Asclepiadaceae) that have leaves that look similar to those of Matelea reticulata (Green milkweed vine).  Here is the USDA Plants Database County Distribution Map for Texas for Matelea reticulata.  The pods, holding the seeds, are called follicles.

Cynanchum racemosum var. unifarium (Talayote) has similar leaves and smooth green follicles.  The USDA Plants Database County Distribution Map for Texas shows it occurring in Blanco County adjacent to Bexar County.

Photos of the follicles of Funastrum cynanchoides ssp. cynanchoides (Fringed twinevine) are difficult to find, but Southeastern Arizona Wildflowers has photos of Funastrum cynanchoides (without the subspecies indicator), including photos of the follicles. The USDA Plants Database County Distribution Map for Texas shows it in Comal County adjacent to Bexar County.  Shinners & Mahler's Illustrated Flora of North Central Texas on p. 283 says that the follicles of Funastrum are smooth.  There is a line drawing on p. 285.

Matelea gonocarpos (Anglepod) has a follicle without bumps on the exterior but does have ridges—thus the common name of Anglepod.   Here are photos from Vanderbilt University showing the pod.  The USDA Plants Database County Distribution Map for Texas shows it occurring in Kendall and Comal Counties adjacent to Bexar.

Matelea cynanchoides (Prairie milkvine) has leaves that look a bit like those of Matelea reticulata and does occur in Bexar County according to the USDA Plants Database County Distribution Map for Texas.  The photos shown on the Louisiana Department of Wildlife and Fisheries webpage shows what appears to be smooth follicle.  However, the description in Correll & Johnston Manual of the Vascular Plants of Texas (p.1238) describes the follicle as being "more or less muricate" (muricate = "covered with short hard protuberances" according to the University of North Carolina Plant Information Center's Botanical Dictionary).

Cynanchum laeve (honeyvine) has a similar leaves and a smooth follicle; but  the nearest reported occurrence to Bexar County on the USDA Plants Database County Distribution Map for Texas is in Travis, Bastrop and Gonzales Counties. 

There may be enough in the photos and information above to determine which milkweed vine you have found.  If not you might be able to separate your plant from the other species by comparing other features such as leaf arrangement of the presence of hairs on the leaves and stems.  In Shinners & Mahler's Flora of North Central Texas, from pages 281 through 286, there are descriptions and line drawings of all of the above species.  You might also save the follicle and its seeds and try growing them next year to see its flowers.  Visit MonarchWatch.com for information about propagating milkweed seeds.

We no longer accept photographs of plants for identification because we did not have enough staff or volunteers to handle the volume of photos we received.  We do, however, show links on our Plant Identification page to several plant identification forums that will accept photos for identification.

 

More Plant Identification Questions

Identity of a plant in Ohio
May 11, 2009 - Trying to identify a tree/shrub in Ohio. It grows from 6-8', and blooms through the summer. It has small green glossy leaves, and bell/trumpet shaped flowers in pink, white, or yellow with stripes. T...
view the full question and answer

Plant identification
November 02, 2010 - Near Abilene State Park, a plant's leaves turn purple and it seems to have a pineapple looking growth. We call it the purple pineapple?
view the full question and answer

Diamonds and Rubies plant (Lychnis coronaria)
May 02, 2007 - I recently purchased a plant from the Huntsville, AL Botanical Gardens at their annual plant sale. The name on the plant tag is "Rubies and Diamonds". No one at the Botanical Garden knew the scien...
view the full question and answer

Mystery berries on vine in Montgomery County, TX
August 09, 2013 - While out in the woods today on Caney Creek near Grangerland, Texas, I found what I thought to be some grapes on a vine hanging down from a tree. I brought the vine down, but when I got it home to pr...
view the full question and answer

Identification of lily in Florida Savannas Preserve State Park
December 19, 2013 - I found a lily blooming in the Savannas Preserve State Park in Martin County Florida. It is similar to a Michaux lily but doesn't have apparent spots. The foliage is also different from photos I ha...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.